brandsweets

Color

#515b76

#515b76
hex#515b76
rgbrgb(81, 91, 118)
hslhsl(224, 19%, 39%)
oklchoklch(0.473 0.046 268.8)
Closest name: Deep Indigo (#4c567a)Relative luminance 0.1054
CoolMuted
Open in palette toolCheck contrast

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →
515b76766c51

#766c51

Analogous

Open in tool →
515b76516e76595176

#516e76 · #595176

Triadic

Open in tool →
515b7676515b5b7651

#76515b · #5b7651

Split-complementary

Open in tool →
515b767659516e7651

#765951 · #6e7651

Tetradic

Open in tool →
515b7676516e766c51517659

#76516e · #766c51 · #517659

Contrast

#515b76 as textRatioAAAA largeAAAFix
Aaon white
6.76:1passpassfail
  • AAA: use #4e5873 as the text (7.08:1)
Aaon black
3.11:1failpassfail
  • AA: use #677498 as the text (4.53:1)
  • AAA: use #8c96b1 as the text (7.11:1)
  • AA: or shift the background to #d4d4d4 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #515b76 as the background.

Brands using this color

mcpConnect your agent — build around #515b76
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

›analyze #515b76 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/515b76-9ca2c4-df724e-221f2d-e9eff1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md